Metric and Customary Units and Conversions
METRIC and U.S. MEASUREMENT EQUIVALENCIES
METRIC SYSTEM OF MEASUREMENT:
Basic unit of LENGTH METER (m) 100cm = 1000 mm = .001 km
Basic unit of MASS (weight) GRAM (g) .001 kg = 1000 mg
Basic unit of CAPACITY (liquid measurement) LITER (L) 1000 ml = .001 kl
Important Metric System Prefixes:
|kilo |= |1,000 | deci |= |0.1 | tera |= |1,000,000,000|
| | | | | | | | |,000 |
|hector |= |100 | centi |= |0.01 | giga |= |1,000,000,000|
|deca |= |10 | milli |= |0.001 | mega |= |1,000,000 |
LENGTH WEIGHT CAPACITY
1 meter (m) = 100 centimeters (cm) 1 gram (g) = 1000 milligrams (mg) 1 L = 1000 mL
1 cm = 0.01 m 1 kilogram (kg) = 1000 grams 1 mL = 0.001 L
1 m = 1000 millimeters (mm) 1 mg = 0.001 g 1 k = 1000 L
1 mm = 0.001 m 1 g = 0.001 kg
1 cm = 10 mm
1 mm = 0.1 cm
1 kilometer = 1000 m
1 m = 0.001 km
1 megameter = 1,000,000 m
1 hectometer = 100 m
1 dekameter = 10 m
1 decimeter = 1/10 m
1 cm = 1/100 m
1 mm = 1/1000 m
1 micrometer = 1/1,000,000 m
U.S. CUSTOMARY SYSTEM OF MEASUREMENT:
LENGTH WEIGHT CAPACITY AREA
1 foot = 12 inches 1 lb = 16 oz 1 cup = 8 fl oz 1 ft2 = 144 in2
1 yard = 3 feet 1 ton = 2,000 lbs 1 pint = 2 cups 1 yard2 = 9 ft2
1 yard = 36 inches 1 quart = 4 c/2 pts 1 acre = 43,560 ft2
1 mile = 5,280 feet 1 gal = 4 quarts 1 mile2 = 640 acres
APOTHECARIES’ WEIGHTS and MEASURES:
1 dram = 60 grains (gr) 1 fluid dram = 60 minims
1 ounce = 8 drams 1 ounce = 8 fluid drams
1 pound (lb) = 12 ounces 1 pint (pt) = 16 oz
1 ounce = 480 gr 1 quart = 2 pints
1 fluid oz = 480 minims 1 gallon = 4 quarts
1minim = 1 gr
CONVERSION BETWEEN U.S. CUSTOMARY SYSTEM and METRIC SYSTEM:
LENGTH WEIGHT CAPACITY
1 inch = 2.54 centimeter 1 oz = 28.35 grams 1 liter (L) = 1.06 quarts
1 meter = 3.28 feet 1 lb = 454 grams 1 gallon = 3.79 L
1 meter= 1.09 yards 1 kg = 2.2 lb
1 mile = 1.61 kilometers
HOUSEHOLD MEASUREMENTS:
1 fluid teaspoonful (t) = 60 drops (gtt)
1 fluid tablespoon (T) = 3 t
1 fluid ounce (oz) = 2 T
1 fluid ounce (oz) = 6 t
1 teacupful = 4 oz
1 ounce = 360 gtt
1 glassful = 8 oz
APPROXIMATE EQUIVALENTS
METRIC APOTHECARIES HOUSEHOLD
1 ml = 15 minims = 15 gtt
4 ml = 1 fluid dram = 60 gtt = 1 t
15 ml = 4 fluid drams = 1 T
30 ml = 1 oz = 2 T
500 ml = 1 pint
1000 ml = 1 quart
65 mg = 1 gr
1000 mg = 15 gr
4 g = 1 dram
30 g = 1 oz
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